I thought you were talking about the over under on what it would actually do, not what was necessary!
This would be a crazy bet, there's absolutely no way it will get anywhere near 95% success rate.
Success has to be:
1) With traffic that the car has to respond to. Can't be an empty road. (Successes where it goes with no traffic at all don't count, even though that would be an improvement from 10.12.)
2) Car has to go at the first opportunity when a decent human driver would go, when there is a nice relaxed opening. (This is the hardest thing to define but I'll know it when I see it.)
3) The car cannot cause any other car to slow down or react at any point in the maneuver (by poking out, moving forward at the wrong time), etc. Including if it stops halfway through in the median - it cannot result in any car slowing or yielding to it or anything like that.
4) The car can't do anything incorrect, like stopping in the first lanes of traffic (even if there is no one coming) to wait for traffic from the other direction.
5) Interventions including accelerator application count as failures.
I'd be VERY surprised if it reaches 30% success rate. So I'd bet less than 30%.
Someone should design a poll.